An economizer
An attemperator
A water dram
A down-comer tube
第1题：
A bypass line provided around a waste heat auxiliary boiler in a diesel engine exhaust system, may be used to avoid boiler ______.
A.corrosion at low engine loads
B.erosion at high engine loads
C.overload at high engine loads
D.scaling at all exhaust temperatures
第2题：
the former
the first
the latter
the last
第3题：
A.salinity is abnormally
B.high steam demand is too
C.feed-water flow is low
D.water level is abnormally low
第4题：
increased heat transfer
fireside erosion
high steam demand
overheated tubes
第5题：
relieve excess fuel oil pressure during the “off” fire cycle
admit water to the dry pipe
throttle the forced draft fan output for proper combustion
reduce excess steam pressure in the boiler
第6题：
Which statement about the inert gas system is TRUE ________．
A.Boiler soot blowers should never be used when the IG system is operating
B.The boiler will produce the best quality of flue gas for the IG system when the boiler load is very light
C.The boiler will produce the most quantity of flue gas for the IG system when the boiler load is very light
D.Flue gas with excessive oxygen content is de-oxygenated in the scrubber
第7题：
Receives saturated steam from the generating tubes
Serves as a reservoir of boiler feed water
Holds internal fittings for separation of moisture from steam
Collects steam exhausted from the turbines
第8题：
If the feed pump for an auxiliary boiler fails to deliver the feed water to the boiler, the cause may be ______.
A.high steam pressure in the boiler
B.abnormally high feed-water temperature
C.abnormally high boiler water temperature
D.steam demand exceeding feed pump capacity
第9题：
natural circulation of the water in the water tube boiler is better than that in the fire tube boiler
for the same output the water tube boiler will carry less mass of water compared with the fire tube boiler
the water tube boiler will cost shorter time for steam raising
the water tube boiler require lower skill in operating and maintaining
第10题：
steam stop valve
dry pipe
feedwater system
generating tubes